Kinetic energy is the energy an object possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its current velocity.
Kinetic energy can be calculated using the formula KE= 1/2 mv^2, where m is the mass of the object and v is its velocity.
Kinetic energy and work are closely related. Work is defined as the force applied to an object multiplied by the distance it moves. When work is done on an object, its kinetic energy changes. This change in kinetic energy is equal to the work done on the object.
No, kinetic energy cannot be negative. It is always a positive quantity because it is a measure of the energy an object has due to its motion.
Kinetic energy plays a significant role in an object's motion. The higher the kinetic energy of an object, the faster it will move. This is because a greater amount of energy is required to increase an object's velocity if it already has a high kinetic energy.